Suspension Help

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Rocket Man

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Thank you for the info.

Is there a way to check if the self leveling is even working?
Check the rubber bellows on the rear shocks and see if they’re firm and thus inflated, after driving. Another way to check is after the truck has sat overnight or all day, start it up and walk to the driver side rear and listen for the compressor to come on and look carefully at the fender to see if the rear of the truck lifts up a little and the compressor shuts off.
 
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1xd5

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Check the rubber bellows on the rear shocks and see if they’re firm and thus inflated, after driving. Another way to check is after the truck has sat overnight or all day, start it up and walk to the driver side rear and listen for the compressor to come on and look carefully at the fender to see if the rear of the truck lifts up a little and the compressor shuts off.
Thank you, will do.
 

adventurenali92

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Sorry for the lateness of my reply. Just now seeing that I was tagged after finishing giving my rig an oil change. @1xd5 Looking at the photo of that red Denali xl that you posted beside your truck and reading the thread that you linked, it appears that the owner of that truck didn’t just swap out the factory torsion keys for leveling keys to achieve enough lift to fit that tire setup. There’s mention of Z71 coil spring swap, which lifts the rear of the truck up for sure, from what I’ve read on others member’s lift threads here. The thread also mentions rough country shocks so I’m assuming longer shocks were necessary. Doesn’t say what shocks but I’m guessing he deleted the Z55 suspension setup with the rough country shocks.

So quite a bit more in depth since leveling keys alone won’t lift the truck enough to fit that big of a tire on stock suspension. To also add to the info in this thread the factory does setup a mild rake to the suspension. At least with the GMT800s they were definitely not level out of the factory. The front is set a tad bit lower than the rear, from what I understand to help with aerodynamics and fuel consumption. I can say for certain this is how my truck was setup on stock suspension.

The leveling keys will lift the front of the truck a tad bit higher,
I did that to my 2006 Denali xl. Not sure what brand keys were used but it brought up enough to fit a 275/65 Michelin LTX A/T2 tire on my truck a couple years ago. Running a different tire setup now but still have the leveling keys.
 
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1xd5

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Sorry for the lateness of my reply. Just now seeing that I was tagged after finishing giving my rig an oil change. @1xd5 Looking at the photo of that red Denali xl that you posted beside your truck and reading the thread that you linked, it appears that the owner of that truck didn’t just swap out the factory torsion keys for leveling keys to achieve enough lift to fit that tire setup. There’s mention of Z71 coil spring swap, which lifts the rear of the truck up for sure, from what I’ve read on others member’s lift threads here. The thread also mentions rough country shocks so I’m assuming longer shocks were necessary. Doesn’t say what shocks but I’m guessing he deleted the Z55 suspension setup with the rough country shocks.

So quite a bit more in depth since leveling keys alone won’t lift the truck enough to fit that big of a tire on stock suspension. To also add to the info in this thread the factory does setup a mild rake to the suspension. At least with the GMT800s they were definitely not level out of the factory. The front is set a tad bit lower than the rear, from what I understand to help with aerodynamics and fuel consumption. I can say for certain this is how my truck was setup on stock suspension.

The leveling keys will lift the front of the truck a tad bit higher,
I did that to my 2006 Denali xl. Not sure what brand keys were used but it brought up enough to fit a 275/65 Michelin LTX A/T2 tire on my truck a couple years ago. Running a different tire setup now but still have the leveling keys.
Thank you for your reply.

Do you happen to have any pictures of your setup with the Michelins, and now ? I’m curious to see. So all you did was the keys ? Did that affect anything ? And you didn’t do anything to the rear suspension ?
 

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